弹性铰链对汽车风洞天平解耦性能的影响研究

The Effect of Elastic Hinges on the Decoupling Performance for Vehicle Wind Tunnel Balance

摘要: 为明确汽车风洞六分量天平机械解耦性能对测力试验结果的影响，本文开展了针对汽车风洞天平简化模型的弹性铰链解耦性能仿真研究。该天平简化模型由浮动框、弹性连杆、弹性铰链、传感器以及固定框组合而成，将无弹性铰链与其他五种不同型式弹性铰链的仿真结果进行对比研究，结果表明，使用弹性铰链能够大大的降低天平系统中的维间干扰，并且在五种弹性铰链中，单十字梁圆型铰链的综合解耦效果最好。接着对单十字梁圆型弹性铰链的两个特征尺寸开展具体的研究，研究发现，单十字梁圆型弹性铰链的支撑片高度和厚度是影响天平机械解耦性能的重要参数。

Abstract: To investigate the impact of a six-component force balance in the automotive wind tunnel, a numerical simulation study was conducted on a simplified balance model with elastic hinges. The model consisted of a floating frame, elastic connecting rods, elastic hinges, sensors, and a fixed frame. Comparisons were made between simulations with no hinge and five different elastic hinges, revealing that the use of elastic hinges significantly reduced cross-axis coupling. The results showed that the single-cross circular hinge provided the best overall decoupling performance. Further analysis of the two characteristic dimensions of the single-cross circular hinge indicated that the height and thickness of the support piece for the single-cross circular elastic hinge are important parameters that affect the mechanical decoupling performance of the balance.